For air cooling, I'd expect that an hour of burning would be plenty to get stable max temperatures. Even a water-cooling system will usually hit equilibrium in under a half hour. We're not looking to verify system stability, just max load temps. But it would be nice if posters made (continued to make) note of the specific methods, just for general knowledge. And for those using Prime95, large-FFT's usually gets the CPU hottest.
__________________ i7 2600K | ASUS Maximus IV GENE-Z | GTX Titan | Corsair DDR3-2133 |